Sponge surface



The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by the Office upon request and payment of the necessary fee.

FIG. 1 is a perspective view showing the new design for a sponge surface;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a front view thereof, the rear view being a mirror image; and,

FIG. 5 is a left view thereof, the right view being a mirror image.

The broken lines illustrate the boundary of the enlarged views and form no part of the claimed design. 

CLAIM We claim the ornamental design for a sponge surface, as shown and described. 